From: Andrii Nakryiko andriin@fb.com
commit 4ee1135615713387b869dfd099ffdf8656be6784 upstream.
Fix a potential overflow issue found by LGTM analysis, based on Github libbpf source code.
Fixes: 3d65014146c6 ("bpf: libbpf: Add btf_line_info support to libbpf") Signed-off-by: Andrii Nakryiko andriin@fb.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Link: https://lore.kernel.org/bpf/20191107020855.3834758-3-andriin@fb.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- tools/lib/bpf/bpf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -189,7 +189,7 @@ static void * alloc_zero_tailing_info(const void *orecord, __u32 cnt, __u32 actual_rec_size, __u32 expected_rec_size) { - __u64 info_len = actual_rec_size * cnt; + __u64 info_len = (__u64)actual_rec_size * cnt; void *info, *nrecord; int i;